How to restart a participant in a Storyline

Here's how you go about restarting a participant (subject, patient) in a Mosio Storyline:

Find the participant in the contact list.

Click the person profile icon to show the profile.

Click on "Group Storyline" to see the storylines.

and

Click the X button on the storyline line (button on the far right).

Re-add the participant to the storyline on the correct starting day.

That's it! You are basically stopping them on a Storyline using the X option in Contacts, then "restarting" them by re-adding them to the same Storyline right after.